Car-coupling



(NoModel.) l 4'I'. H. SIMPSON.

VCAR GOUPLING. n No. 595,351 Patented Deo. 14', 1897.

El E] (/q -E- @CZ UNITED STATES PATENT OFFICE.

THOMAS Il. SIMPSON, OF DETROIT, MICHIGAN.

CAR-COUPLING.

SPECIFICATION forming part of Letters Patent No. 595,351, dated December14, 1897.

Application led August 1897.

To all whom t may concern:

Be it known that I, THOMAS H. SIMPSON, a citizen. of the United States,residingat Detroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvem ent in Car-Couplers; and I declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification.

' My invention has for its object certain new and useful improvements incar-couplers; and

it consists of the construction, combination, and arrangement of deviceshereinafter specified and claimed, and illustrated in the accompanyingdrawings, in which- Figure l is an inverted plan View of the head of thedraw-bari Fig. 2 is a horizontal section on line 2 2, Fig. 3. Fig. 3 isa vertical section on the line 3 3, Figs. l and 2. Fig.4 is a detailview showing the method of engaging the coupling-pin in the head, asillustrated in Fig. 1. Figs. 5, 6, and 7 are detail views illustratingmodications inthe manner of engaging theV pin in the head to hold thepin from rotation.

The objects of myinvention include means for holding the coupling-pinfrom rotating in the head of the draw-bar or coupler and also means tostrengthen the head of the draw-bar or coupler. Y

Owing to thestrain upon coupling devices, and especially owing to theincreased strain coming upon them in-- consequence of the growingtendency to enlarge the size and weight of cars, it becomesindispensably n ecessary to strengthen the draw-bars or couplers,inorder that they may resist the increased strain. Furthermore, inasmuchas the heads of the draw-bars 4or couplers are commonly made ofmalleable iron, while the knuckles and pins are made of steel, there isan inevitable tendency for the locking-pin when it is permitted torotate to wear the adjacent parts of the coupler-head, themalleablepcasting of the head being'of softer metal. Itis the purpose ofmy invention to remedy these diculties and to provide means for securingthe desired ends above referred to.

I carry out my invention as follows:

Serial No. 648,915. (No model.)

zontally on opposite sides of the coupling-pin,

as indicated at o. and a2, to permit the insertion of a key A through acorresponding orifice in the base ofthe pin, the. shoulders of theorifices a and c2 engage the key A from turning, and consequently holdthe pin O from turning in the head. I would have it delinitelyunderstood, however, that my invention broadly contemplates holding thepin from turning in the head in any suitable manner and by any suitablemeans. Therefore my object may be accomplished by constructing the pin Owith a flattened portion, (indicated in Fig. 5 at 0,) said -pin beingcut away to form said flattened portion, the head being formed with acorresponding shoulder (indicated at a3) to engage the flattened face ofthe pin, or, as shown in Fig. 6, the pin C may be formed with a rib c toengage in the corresponding keyway (indicated atV c4) in the head, or,as indicated in'Fig. '7 the pin C may be cut away at its lower end toform a squared end, (indicated at 02,) the head A being formed with acorresponding opening to receive the squared end lof the pin. In theseways the pin may readily be held from turning in the -head and othermeans may be employed for accomplishing the same results within thescope of my invention. To prevent the locking-pin from turning in thehead will obviously prevent wear upon the head,the knuckle rotating uponthe pin. Neither do I limit the application of the means to hold the pinfrom turning to the lower end thereof, as it may thus be held bysuitable means otherwise located. The key A may be a split-key Y IOO Theopposite side of the head carrying the knuckle is also constructed withan outer wall AG and with an inner wall A7, (indicated in full lines inFig. 3 and in dotted lines in Fig. 2,) said inner and outer walls A3 A4and A6 A7 forming chambers therebetween, respectively, said chamberseach being divided by a strengthening diaphragm or brace, saiddiaphragms or braces being shown at c5 and a6, the same serving to bracethe two outer walls adjacent thereto above mentioned, while saiddiaphragms also brace the front and rear walls of each of said chamberson each side of the mouth of the coupler, said front and rear wallsbeing indicated in Fig. 2 at a7 and as. A head so strengthened mayobviously be made of any desired degree of strength.

It will be observed that the inner wall on the adjacent side of the headstops the inward movement of the knuckle. Said inner wall may be of anysuitable form.

It is evident that the inner wall of the double walls on each side themouth extends from the forward end of the corresponding outer wallinward and rearward to the rear portion of the outer wall of the headcontinuously and unbroken to afford greater strength.

That I claim as my invention is* l. A draw-bar or coupler headconstructed with a mouth, and with double walls on each side of themouth to strengthen the head, the

inner of said walls extending continuously from the forward portion ofthe outer wall to the rear thereof, for the purpose set forth.

2. A draw-bar or coupler head constructed with a mouth and provided withdouble walls on each side the mouth, the inner of said walls extendingcontinuously and unbroken from the forward portion of the correspondingouter wall inward and rearward to the rear of the corresponding outerwall ofthe head, substantially as set forth.

3. A draw-bar or coupler head constructed with a mouth, and with doublewalls on either side of the mouth, said double walls united by ahorizontal connecting diaphragm or brace intermediate the top and bottomof said walls, for the purpose set forth.

4. A draw-bar or coupler head constructed with a mouth and provided withdouble walls on cach side of the mouth, the double walls on each sidethe mouth united by an inner horizontal connecting diaphragm or braceintermediate the top and bottom of said walls, for the purpose setforth.

In testimony whereof I sign this specification in the presence of twowitnesses.

THOMAS H. SIMPSON.

I'Vitncsses:

N. S. WRIGHT, MARY HICKEY.

